Starting device for la cour motors.



mann stradine rerum carton.

j EORGE R. BENJAMIN, OF JERSEY CTY, NEVI JERSEY, ASSIGNOR T0 THE WESTERNUNON TELEGRAPH OOMEANY, OF NEW YORK, N. Y., A CORPORATION' 0F NEW YORK.

STARTING- DEVICE FOR LA. COUR MOTORS.

1,284,2119. Specification of Letters Patent.

Patented Nov. 12, i918..

Application filed July 3, 1915. Serial No. 37,825.

To all whom it may concern: 7 and' 8, one of which screws is connected,as Be it known that I, GEORGE R. BENJAMIN, hereinafter shown, to one setof magnets a citizen of the United States of America, 33, the otherscrew being connected to the and a resident of Jersey City, county ofother set of magnets t-d. 9 designates a 5 Hudson, and State of NewJersey, have incam wheel mounted upon the shaft 10 of the 60 Ventedcertain new anduseful Starting Defly wheel 1 and armature wheel 2, theteeth vices for La Cour Motors, of which the tolof this cam wheelcorresponding generally lowing is a specification. to the teeth ot thearmature wheel :2. 11 My invent-ion relates to starting devicesdesignates a spring-pressed hand lever piv- 1@ for Lar Cour motors,sometimes termed oted at 1:2 to a. stationary member ot' the 65 phonicwheel motors. As is well known, trame ot the machine; and 13 and 14desigsuch motors comprise a toothed wheel, tormnate bell crank contactlevers, pivoted to ing an armature, and two or more magnets this lever11, one end of each of the bell arranged to act upon such armature andcrank levers 13 and 14e carrying an anti- 125 which are also arranged tobe energized and friction roller 15 adapted for coaction with 5i@denergized in alternation. Such energizathe cam wheel 9, the other armsof said tion and denergization ot vmagnets is usubell crank levers beingconnected by a Spring a'lly effected by contact means operated by a 16tending to hold them against tho cam tuning fork, vibrating reed, orother memwheel. Suitable contact stops 17 and 18 are 2@ ber which willoperate at a ve 1y uniform provided for levers 13 and 14; respectively.if@ speed. 'lhese Cour motors are not selt- 19 designates a case fixedto a suitable start-ing, but require to be spun up to a roportion or theYtrame of the machine and tative speed, approximately corresponding1having within it a plurality of contact to the speed ot vibration ot thecontrolling springs, as shown particularly in the lower 2o forli orvibratingl reed, by hand or by other portion of 1, wherein this chamber19 means. it is frequently inconvenient to do is shown in connectionwith the circuits this. My invention comprises means wherewhich itscontact springs serve. These conby once the wheel ot the motor be givenn tact springs comprise two main springs 2O slight rotative 4motion7that rotation will and Z1 which have a tendency to make conit@ becontinued with progressively increasing tact with other springs QQandS23, respec- @tl sp Jed, until the wheel reaches a speed cortively, butin the lower portion ot Fig. 1 responding to that ot the tuning fork orare shown as separated by means of a wedge vibrating reed which is tocontrol piece 24, carried by and operated by the The object of myinvention is to facili* handle 11; and these springs 20 and 21, when @otate the starting of La Cour motors. and to so separated, are in contactrespectively with do this by simple means. Contact pieces 25 and 26.

1 will now proceed to describe my invenrll`he circuits are as follows:tion with reference to the accompanying Starting from the battery B a|conductor drawings, and will then point out the novel 27 leads to handlever 11 and thence to bell e@ features in claims. lin said drawings:crank contact levers 13 and 14. The contact Figure 1 shows, more or lessdia grammatistop 17 ot one of these levers, 13, is connectcally, a LaCour motor having my improved ed by a conductor Q8 to contact member 25.starting device applied thereto. The contact stop 18 of the other bellcrank Fig. 2 shows a top view of the starting contact lever, 14, isconnected by conductor e5 device. 29 to contact piece Q6. Contact spring2C* is too 1n the drawings 1 designates the usual tly connected byconductor 30 to the two magwheel of a La Cour motor, behind which 1 netst and thence through one side of a curha-ve shown, in Fig. 1, and indotted lines, rent meter 31 and regulating rheostat 32, to the usualtoothed armature wheel and the the other pole ot' battery B. Contactspring ao usual magnets 3-3 and 'st-4f, connected in 21 is connected byconductor 33 to magnets 3 multiple groups of two each. 5 designates andthence through the other side of cura controlling device consisting inthis inrent meter 31 and rheostat 32, to battery B, stance of anelectrically driven tuning fork, rThe plus pole of battery B is alsoconnected one tine of which carries a contact spring ti to the base ofthe ork 5, and thence through to playing between adjustable contactscrews the contact spring t3 on one tine of that tito to contact screws7 and 8 in alternation. Contact screw 7 is connected by a conductor 34to contact spring 23; and contactv screw 8 is connected by conductor 35to contact spring 22.

Assuming that the tines of the fork 5 are in vibration, maintained, asis customary, by the usual driving magnet 36 and contact device 37-38:If now, the outer or right hand end of lever 11 be depressed slightly,and the fly wheel'l be given a slight start in the proper direction ofrotation, bell crank contact levers 13 and 14 will be operated by thecam wheel 9, and thereby magnets 3-3 and 4 4 will be energizedalternately as follows: from positive poleof battery B through conductor27 to hand lever 11 and thence through bell crank 13 and its stop 17 tocontact piece 2,5, contact spring 20 then in contact therewith,conductor 30, and magnets 4, back to battery; or, in alternation, fromlever 11, through bell crank 14, lits contact stop 18, conductor 29,contact piece 26, contact spring 2l, and magnets 3, back to battery. Itwill be seen that only a very slight push need be given to fly wheel 1in order to start the cam 9 and cause that cam to operate the bell crankcontact levers 13 and 14 two or three times; `and with even oneenergization of magnets 3 followed by energization of magnets 4, and soon, or vice versa, the La Cour motor will pick up; rotation of its4armature and fly wheel, and of the cam 9, then continuin because of thealternate energization and energization of magnets 3 and 4. Under suchconditions, the La Cour motor tends to increase in speed quite rapidly,and when its speed is judged to be suffciently high the lever 11 isreleased, and then rises sufficiently to move the bell crank contactlevers 13 and 14 out of the path of the cam Wheel 9; the wedge 24 of thespring contact mechanism being thereby lifted, so as to permit contactsprings 20 and 21 to break contact with contact pieces 25 and 26, and tomake contact with contact springs 22 and 23 respectively. The circuitsare then the' 'normal circuits of a La Cour motor, the current from thepositive poleI of battery B passing through one tine of the fork 5 tospring 6 and thence through contact screws 7 and 8, and their circuitconductors 34 and 35, in alternation; the circuit of conductor 34passing through contact springs 23 and 21 to conductor 33 and magnets 3,and so back to battery; the circuit of conductor 35 passing throughcontact springs 22 and 20 and through conductor 30 to magnets V4 and soback to battery.

What I claim is 1., The combination with the magnets and armature wheelof a La Cour motor, and normal operating contact means for energizingand denergizing such magnets in alternation at`-a substantially uniformrate, of

starting means for such motor comprisin auxiliary contact means operatedby sai armature wheel in its rotation, and arranged when sov operated toenergize the magnets of said motor in alternation, and switching meansarranged at will to connect the normal operating contact means or saidauxiliary contact means, alternatively, to the said magnets of themotor, said auxiliary contact means comprising means for throwing suchauxiliary contact means out of mechanical operation when the switchingmeans disconnects such auxiliary Contact mechanism from the motormagnets, and a single operating device for said starting means andswitching means.

2. The combination with the magnets and armature Wheel of a La Courmotor, and normal operating contact means for energizing and denergizinsuch magnets in alternation at a substantially uniform rate, of startingmeans for such motor comprising auxiliary contact means operated by saidarmature wheel in its rotation, and

comprising a rotary member arranged to be.

rotated by the motor wheel, and means operated by said rotary member forenergizin the magnets of the motor in alternation; and switching meansarranged at will to connect the normal operating contact means or saidauxiliary contact means, alternatively, to the said magnets of themotor, said auxiliary contact means comprising means for throwing suchauxiliary contact means out of mechanical operation when the switchingmeans disconnects such auxiliary contact mechanism from the motormagnets, and a single. operating device for said starting means andswitching means.

3. The combination with the magnets and toothed armature wheel of a La@our motor, and normal operating contact means for energizing anddenergizing such magnets in alternation at a substantially uniform rate,of starting means for such motor comprisin auxiliary contact meansoperated by sai armature wheel in its rotation, and com rising a camwheel arranged to be rotate b the motor wheel, and toothed in corresponence with said motor wheel, two contact mechanisms mechanically operatedby said cam wheel, and circuits from said 4contact mechanisms to themotor magnets, all arranged to cause the energization of said motormagnets in alternation as the cam wheel rotates; and switching meansarranged at will to connect the normal operating contact means or saidauxiliary contact means, alternatively, to the said magnets of themotor. l

4. The combination with the magnets and toothed armaturewheel of a LaCour motor, and normal operating contact means for energizing anddenergizing such magnets in alternation at a substantially uniform ratezof starting means for such motor comprising auxlliary contact meansoperated by sald armature wheel in its rotation, and

comprising a cam wheel arranged to be ro' tated by the motor wheel, andtoothed in correspondence with said motor wheel, a pivoted lever,twocontact mechanisms each having a movable member carried by said leverand arranged to be brought into operative coaction with'said cam wheelby motion of said lever in one direction, said lever provided with meanstending to hold it in such position that the said movable members ofsaid contact mechanisms are out of coaction with said cam wheel, andswitching means arranged at will to connect the normal operating contactmeans or said auxiliary contact means, alternatively, to the saidmagnets of the motor.

5. The combination with the magnets and toothed armature wheel of aLaCour motor, and normal operating contact means for energizingl anddenergizing such magnets in alternation at a substantially uniform rate,of starting means for such motor comprising auxiliary contact meansoperated by said armature wheel in its rotation, and comprising a camwheel arranged to be rotated by the motor wheel, and toothed "incorrespondence with said motor wheel, a pivoted lever, two contactmechanisms each comprising a spring actuated bell crank contact membercarried by said lever and a contact stop, said lever arrangedto be movedto bring such bell crank contact members into positionto be operated bsaid cam wheel, but normally holding sai bell crank contact member outof coaction with said cam wheel, vand switching means arranged at willto connect the normal operating contact means or said auxiliary contactmeans, alternatively, to the said magnets of the motor.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.v

' y GEORGE R. BENJAMIN.

Witnesses:

- i W. H. McELRor,

PAUL H. Fiamma

